diff --git a/mock/LightDMMock.js b/mock/LightDMMock.js
index cf7c41f..5ca033c 100644
--- a/mock/LightDMMock.js
+++ b/mock/LightDMMock.js
@@ -570,3 +570,7 @@ LightDMMock.watch('timed_login_user', function() {
 LightDMMock.watch('timed_login_delay', function() {
     window.deprecationNotifier("property", "timed_login_delay", "lightdm.autologin_timeout");
 });
+
+if (module) {
+    module.exports = LightDMMock;
+}